Our atttain gtc pro disc is an ampligsthetic and functional masterpiece this high performance race bike combines the comfort and performance of a high tech carbon frame with the latest brake technology genuine long distance ability superb efficiency and unbelievable comfort are all in the attain gtc pro discs genes optimising a frame for disc brakes is both art and science and as part of the process we chose an x12 axle system both front and rear to improve rigidity the forces involv